Evaporator.



J.E.DUNN. EVAPORATOR. APPLICATION IILED 00124, 1911.

Patented July 23, 1912.

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UNITED STATES PATENT oFirIoE.

JOSEPH E. DUNN, OF PHILADELPI -IIA, PENNSYLVANIA. I

EVAPQRATOR.

Specification of Letters Patent.

Patented Ju1 23, 1912.

Application filed October 24, 1911. Serial No. 656,429.

to concentrated or solidform and my leading objectis to provide improvedmeans for circulating and heating the matter to be so reduced.

The characteristic features of my invention are disclosed in thefollowing, description and the accompanying drawings in illustrationthereof.

In the drawings, Figure 1 is an elevation, part sectional, of apparatusembodying my improvements; Fig. 2 is a top plan view of the same; Fig.3-is a sectional view taken on the line 3--3 of Fig. 1; Fig) 4 is avertical sectional. view taken through a part of a modified constructionfor. circulating the solution; Fig. 5 is a side elevation of the top ofone of the heating tubes, and Fig. 6 is a vertical sectional view of thetop of the tube shown .in Fig. 5. I

The apparatus, as illustrated in Figs. 1, 2, and 3, comprises the shells1, 2, 3, and 4 containing the respective sheets 5, 6, 7, and 8respectively forming the top evaporating and bottom steam chambers 9 and10 in the shell l, 11 and 12 in the shell 2, 13 and 14 in the shell 3,and 15 and 16 in the shell 4. Heating tubes 17, 18, 19 and 20 have theirlower open ends set in the respective sheets 5, 6,7, and 8 so as tocommunicate with the steam chambers, and their upper ends, above theliquid space in the evaporating chambers, substantially closed by caps"21 containing lateral vents 22, the caps having the deflectors23extending over the vents, as illustrated in Figs. 5 and 6.

The evaporating chamb r 9 has the pipe 24, containing the valve 25,connected therewith through the shell 1 for 'the introduction of thesolution thereto, and the pipe 27, containing the valve 28, is connectedwith this chamber through the center of the sheet 5 and passes throughthe chamber 10 to carry away the concentrated product. Con

centric battles 29, 30 and 31, together with the radial baffle 32connecting the alternate ends of the concentric baflies, extend upwardlyfrom the sheet 5 and form the concentric passes 33, 34, 35 and 36through 24 flows (in contact with heating tubes 17 extending upwardlythrough such passes), in reverse directions, to the central pass 36 andthe discharge pipe'27, the tops of the batllesand the surface of-thesolution being below the vents22.

27 connected therewith through the shell 2, for the introduction ofsolution'from the valve 38, is connected with the chamber 11 through thecentral part of the sheet 6 and passes through the chamber 12 todischarge the concentrated solution from the second effect. A'bafile 39,having the character of a distorted spiral, extends upwardly from .thesheet 6 and forms a pass, comprising the convolutions 40, 41 and,42,through which 18, to the discharge 'pipe 37, the baflies and liquorsurface in the chamber 11 being below the'vents 22 in the tubes.

for the introduction of the concentrated so- 43, containing the valve44, is connected with the chamber through the shell for the withdrawalof the product therefrom: Parallel bafiles 45 and 46, rising from thesheet 7 and extending in opposite directions from the shell 3 part wayacross the chamber 13, form the connected oppositely extending passes47-and 48 through'whic'h the concentrated solution, introduced by thepipe37, flowsin contact with the tubes 19 to the discharge pipe 43.

' The evaporating chamber 15 -receives the solution from the pipe 43which is connected with the chamber through the shell 4, and thesolution, further concentrated in this chamber, is discharged throughthe pipe 49,

Concentric baflles 51, 52 and 53, together with transversely disposedbailies 54'and 55, rise from the sheet 8 in the chamber 4 to form theconnected passes 56, 57, 58 and 59 through which the solution flows, incontact with the tubes 20, from the pipe 43 to the discharge pipe 49which delivers the prod- The modified construction shown in Fig.

The evaporating chamber 11 has the pipe the solution flows, in contactwith the tubes,

not in finished form or to further apparatus.

which the solution introduced by the pipe chamber 9, and-the pipe 37,containing the v The evaporating chamber 13 has the pipe 37 connectedtherewith through the shell 3,

lution from the chamber 11, and the pipe containing the valve 50, whichis connected with the chamber through the center of the sheet 8 andpasses through the chamber 16.

4, which can be substituted inyor used as acontinuation of, theconstruction shown in Fig. 1, comprises a shell 62 containing a sheet 63which forms two compartments 6% and 65. Tubes 66, having their openlower ends set in the sheet 63 so as to communicate with the chamber6st, rise in the chamber 65 to a plane above the liquor level. Batlies67 extend across the chamber 65 and upwardly to terminals below theliquor level,

while baliies 68 extend across this chamber.

from positions above the liquor surface to terminations above the sheet63, thus forming the connected vertical passes 69 and 70 through whichthe solution flows from the pipe 71 to the pipe 72.

A pipe 7 3 communicates with the chamber 10; a pipe 7% connects the topof the chamber 9 with the chamber 12; a pipe 75 connects the top ofthechamber 11 with the chamber 1%; a pipe 76 connects the top of suctionthat would otherwise obtain. Steam rising from the surface of solutionflowing through the passes 33, 34 and. passes ott through the pipe 7 ato the chamber 12, and, rising in the tubes 18, beats liquor flowingthrough the passes 40, 41-1 and 42. The steam. generated in this effectpasses off through the pipe 75 to the chamber let and, rising in thetubes 19, heats liquor flowing through the passes 47 and 48, the latterliquor giving cit steam which is carried off by the pipe 76 to heat linor in the next effect and so on, the last e ect of the series having anoutlet 77 leading to the atmosphere or to a suitable condenser.

Having described my invention, I claim:

1. An evaporator comprising a shell con taining a sheet forming an upperevaporatinp compartment and a lower steam compartment therein, heatingtubes in said upper compartment having their lower ends set in saidsheet so as to communicate wi h said lower compartment, said tubeshaving vents in the topsithereof and being exposed to solution in saidevaporating compartment and means in said upper compartment for bafihngsolution therein. I

' 2. An evaporator comprising a lower com- .partmcnt for containing aheating fluid, an upper compartment for containing a so' lution to beevapowited, heating tubes in said upper compartment in communicationcompartment for containing a heating fluid,

tubes in each of said upper compartments communicating with therpspective lower compartments, battles in each of said uppercompartments for passing the solution'in indirect courses incontact-,with said tubes, said tubes extending above said baiiics andhaving vents in the tops thereof communicating with said uppercompartments, a passage connecting upper compartments aforesaid wherebysolution flows from one to the other, and a passage connecting the topof an upper compartment aforesaid with a lower compartment aforesaid.

4. An evaporator comprising a shell con- ,taining a sheet forming anupper and a.

lower compartment therein, tubes in said upper compartment having theirlower ends set in said sheet. in communication with said lowercompartment, said tubes having closed tops with lateral vents therein,and means in said upper compartment for bathing the movement of solutionin contact with said tubes,

5. An evaporator comprising an upper compartment for a solution to beevaporated and a lower compartment for a heating fluid, and tubes insaid uppercompartment in communication with said lower compartment, saidtubes having vents in the upper ends thereof and means above said ventsfor bathing fluid discharged therefrom.

In witness whereof I have hereunto set my name this 19th day of October,1911, in the presence of the subscribing witnesses.

J. E. DUNN. Witnesses:

Joe. G. DENNY, Jr., Rom. R. KrroHnL.

